(((Sabby and family))) I am so sorry this is happening to you.
You have every right to be angry. There is absolutely no excuse for the hospital not informing your daughter about the ADHD and partial neuropsych testing that was done. Or the fact that the school system did not follow his IEP.
I do hope that you get some questions answered. I also think you are right that people need to be held accountable for their actions (or in this case lack of action.) Wishing you the best.
Please know you are not alone. And feel free to vent. It helps to get it out. Many gentle hugs to you and your family.